U.S. health officials say only 13 percent of U.S. adults have high total cholesterol. That may seem incredible in a nation where two-thirds of adults are overweight. Experts believe it's largely because so many Americans take cholesterol-lowering drugs, but dropping smoking rates and other factors also contributed. The Centers for Disease Control and Prevention released the report Tuesday. The numbers come from interviews and blood tests of nearly than 6,000 U.S. adults in 2009 and 2010.